Earth visionaries. Climate drivers. Believers. World in their Hands tells the stories of those who saw the importance of our natural world and dedicated their lives to its conservation, preservation, and protection in diverse and inspiring ways. These were tireless champions—thinkers, doers, and fighters who spoke up and took action long before it was fashionable, or critical. Thinkers such as Henry David Thoreau and Aldo Leopold ground us in their deeply rooted emotional and